The engine name is "ZETEC", the six cylinders are called "DURATEC", and your four cylinder is two litres.
I got this off the net, hope it helps...
"The pre-1998 Zetec engines are more desirable for power build-ups because they have a stronger bottom end, hydraulic lifters, and no Variable Cam Timing (VCT) which, at a minimum, can complicate things slightly. In the US market the pre-'98 Zetec is only available as an option for the 1995-1997 Contour model. In addition to the DOHC Zetec, the cost concious Contour consumer could opt for a more mild 2.0L SOHC, a still developing 2.5L Duratec V6, or the ever desirable SVT worked-over version of the Duratec V6 starting at 170HP from the factory.
In its stock form the Contour Zetec puts out 125HP with plenty of room for improvement. Other US market uses for the Zetec include '99-up Ford Focus and '99-up Mercury Cougar. The Focus version of the Zetec has some distinct differences, but the basic geometry is shared between all Zetecs. "